Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 85

Vulnerabilities 15

• Critical 9.3
  CVE-2023-53769

  virt/coco/sev-guest: Double-buffer messages

  In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper wit…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 8, 2025
• High 7.8
  CVE-2023-21102

  In __efi_rt_asm_wrapper of efi-rt-wrapper.S, there is a possible bypass of shadow stack protection due to a logic error…

  linux-raspi2 linux-hwe linux-azure linux-riscv Android Debian Ubuntu Azure Linux
  May 15, 2023
• High 7.8
  CVE-2023-31248

  Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability

  Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 5, 2023
• High 7.8
  CVE-2023-3390 Public exploit

  Use-after-free in Linux kernel's netfilter subsystem

  A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c. Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vu…

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 28, 2023
• High 7.8
  CVE-2023-35001 Public exploit

  Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability

  Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace

  Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 5, 2023
• High 7.8
  CVE-2023-3610

  Use-after-free in Linux kernel's netfilter: nf_tables component

  A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Flaw in the error handling of bound chains causes a use-after-free in the abort path of NFT_MSG_NEWRULE. The vulnerabil…

  Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 21, 2023
• High 7.8
  CVE-2023-3776 Public exploit

  Use-after-free in Linux kernel's net/sched: cls_fw component

  A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the refere…

  Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 21, 2023
• High 7.8
  CVE-2023-4004

  Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

  A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their pr…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Jul 31, 2023
• High 7.8
  CVE-2023-4147 Public exploit

  Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

  A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Aug 7, 2023
• High 7.8
  CVE-2023-53556

  iavf: Fix use-after-free in free_netdev

  In the Linux kernel, the following vulnerability has been resolved: iavf: Fix use-after-free in free_netdev We do netif_napi_add() for all allocated q_vectors[], but potentially do netif_napi_del() for part of them, then kfree q_vectors and leave invalid poin…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 4, 2025
• Medium 5.5
  CVE-2023-1637

  A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu
  Mar 27, 2023
• Medium 5.5
  CVE-2023-53383

  irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4

  In the Linux kernel, the following vulnerability has been resolved: irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4 The T241 platform suffers from the T241-FABRIC-4 erratum which causes unexpected behavior in the GIC when multiple transactions are …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 18, 2025
• Unscored —
  CVE-2022-50661

  seccomp: Move copy_seccomp() to no failure path.

  In the Linux kernel, the following vulnerability has been resolved: seccomp: Move copy_seccomp() to no failure path. Our syzbot instance reported memory leaks in do_seccomp() [0], similar to the report [1]. It shows that we miss freeing struct seccomp_filter …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 9, 2025
• Unscored —
  CVE-2023-20593 Public exploit

  An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access …

  AMD 2nd Gen AMD EPYC™ Processors Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne” Ryzen™ 3000 Series Desktop Processors “Matisse” AM4 Debian Ubuntu Alpine
  Jul 24, 2023
• Unscored —
  CVE-2023-44466 EPSS 45%

  An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5. There is an integer signedness err…

  linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux
  Sep 29, 2023

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2181891
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2213260
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2213455
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2217845
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2220892
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2220893
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225097
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225198
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225239
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2225275
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_5069.json
• report
  https://access.redhat.com/security/cve/CVE-2022-50661
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2420323
• advisory
  https://www.cve.org/CVERecord?id=CVE-2022-50661
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2022-50661
• article
  https://lore.kernel.org/linux-cve-announce/2025120942-CVE-2022-50661-ff17@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2023-1637
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-1637
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-1637
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e2a1256b17b16f9b9adf1b6fea56819e7b68e463
• article
  https://sourceware.org/bugzilla/show_bug.cgi?id=27398
• report
  https://access.redhat.com/security/cve/CVE-2023-3390
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-3390
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-3390
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1240eb93f0616b21c675416516ff3d74798fdc97
• report
  https://access.redhat.com/security/cve/CVE-2023-3610
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-3610
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-3610
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=4bedf9eee016286c835e3d8fa981ddece5338795
• report
  https://access.redhat.com/security/cve/CVE-2023-3776
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-3776
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-3776
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f
• report
  https://access.redhat.com/security/cve/CVE-2023-4004
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-4004
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-4004
• article
  https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/
• report
  https://access.redhat.com/security/cve/CVE-2023-4147